語言

Tuple<T1,T2,T3,T4,T5,T6,T7,TRest>.ToString 方法

定義

命名空間:
System
組件:
mscorlib.dll, System.Runtime.dll
組件:
netstandard.dll, System.Runtime.dll
組件:
System.Runtime.dll
組件:
mscorlib.dll
組件:
netstandard.dll
來源:
Tuple.cs
來源:
Tuple.cs
來源:
Tuple.cs
來源:
Tuple.cs
來源:
Tuple.cs

回傳一個字串，代表該 Tuple<T1,T2,T3,T4,T5,T6,T7,TRest> 實例的值。

public:
 override System::String ^ ToString();
public override string ToString();
override this.ToString : unit -> string
Public Overrides Function ToString () As String

傳回

String

這個物件的 Tuple<T1,T2,T3,T4,T5,T6,T7,TRest> 字串表示。

範例

以下範例建立一個包含1860年至1900年間密西根底特律市人口資料的17元組。 接著它會用該 ToString 方法來顯示元組的資料。

using System;

class Example
{
    static void Main(string[] args)
    {
        Tuple<int, int, int> from1980 = Tuple.Create(1203339, 1027974, 951270);
        var from1910 = new Tuple<int, int, int, int, int, int, int, Tuple<int, int, int>> 
            (465766, 993078, 1568622, 1623452, 1849568, 1670144, 1511462, from1980);
        var population = new Tuple<string, int, int, int, int, int, int,
            Tuple<int, int, int, int, int, int, int, Tuple<int, int, int>>> 
            ("Detroit", 1860, 45619, 79577, 116340, 205876, 285704, from1910);

        Console.WriteLine(population.ToString());
    }

    private static void ShowPopulationChange(int year, int newPopulation, int oldPopulation)
    {
        Console.WriteLine("{0,5}  {1,14:N0}  {2,10:P2}", year, newPopulation,
                          ((double)(newPopulation - oldPopulation) / oldPopulation) / 10);
    }

    private static void ShowPopulation(int year, int newPopulation)
    {
        Console.WriteLine("{0,5}  {1,14:N0}  {2,10:P2}", year, newPopulation, "n/a");
    }
}
// The example displays the following output:
//   (Detroit, 1860, 45619, 79577, 116340, 205876, 285704, 465766, 993078, 
//    1568622, 1623452, 1849568, 1670144, 1511462, 1203339, 1027974, 951270)

open System

let showPopulation year newPopulation =
    printfn $"""{year,5}  {newPopulation,14:N0}  {"n/a",10:P2}"""

let showPopulationChange year newPopulation oldPopulation =
    printfn $"{year,5}  {newPopulation,14:N0}  {(double (newPopulation - oldPopulation) / oldPopulation) / 10.,10:P2}"

let from1980 = Tuple.Create(1203339, 1027974, 951270)
let from1910 = 
    new Tuple<int, int, int, int, int, int, int, Tuple<int, int, int>>(465766, 993078, 1568622, 1623452, 1849568, 1670144, 1511462, from1980)
let population = 
    new Tuple<string, int, int, int, int, int, int, Tuple<int, int, int, int, int, int, int, Tuple<int, int, int>>>("Detroit", 1860, 45619, 79577, 116340, 205876, 285704, from1910)

printfn $"{population}"

// The example displays the following output:
//   (Detroit, 1860, 45619, 79577, 116340, 205876, 285704, 465766, 993078, 
//    1568622, 1623452, 1849568, 1670144, 1511462, 1203339, 1027974, 951270)

Module Example
    Sub Main()
        Dim from1980 As Tuple(Of Integer, Integer, Integer) =
            Tuple.Create(1203339, 1027974, 951270)
        Dim from1910 As New Tuple(Of Integer, Integer, Integer, Integer, Integer, Integer, Integer, _
            Tuple(Of Integer, Integer, Integer)) _
            (465766, 993078, 1568622, 1623452, 1849568, 1670144, 1511462, from1980)
        Dim population As New Tuple(Of String, Integer, Integer, Integer, Integer, Integer, Integer, _ 
            Tuple(Of Integer, Integer, Integer, Integer, Integer, Integer, Integer, Tuple(Of Integer, Integer, Integer))) _
            ("Detroit", 1860, 45619, 79577, 116340, 205876, 285704, from1910)

        Console.WriteLine(population.ToString())      
    End Sub
End Module
' The example displays the following output:
'   (Detroit, 1860, 45619, 79577, 116340, 205876, 285704, 465766, 993078, 
'    1568622, 1623452, 1849568, 1670144, 1511462, 1203339, 1027974, 951270)

備註

此方法回傳的字串形式為 （Item1， Item2， Item3， Item4， Item5, Item6, Item7， Item8...），其中 Item1， Item2， Item3， Item4， Item5， Item6 和 Item7 代表 ， Item1， Item2Item3Item4Item5Item6及屬性的Item7值。 Item8 代表物件Tuple<T1,T2,T3,T4,T5,T6,T7,TRest>屬性的Next.Item1值。 任何額外巢狀元件的價值則跟隨 第8項。 若任一性質值為 null，則表示為 String.Empty。

適用於